Gravitational trapping of carbon dioxide in deep sea sediments: Permeability, buoyancy, and geomechanical analysis

Publication Type  Journal Article
Year of Publication  2007
Authors  Levine, J. S.; Matter, J. M.; Goldberg, D.; Cook, A.; Lackner, K. S.
Journal Title  Geophysical Research Letters
Volume  34
Issue  24
Pages  -
Journal Date  Dec 21
ISBN Number  0094-8276
Accession Number  ISI:000251877400003
Key Words  tree-rings; temperature; strength; porosity; storage

Liquid carbon dioxide injected in deep-sea sediments at km depths and near freezing temperatures is denser than surrounding pore water and will be trapped by gravitational forces. Storage capacity for CO2 in such formations below the ocean floor is shown to vary with seafloor depth, geothermal gradient, porosity, and pore water salinity. The formation permeability, or the successful engineering of such permeability through hydraulic fracturing, will determine the capacity for gravitational trapping in deep-sea geological formations. We conclude that most ocean sediments at appropriate depth will lack the required permeability and that conventional hydraulic fracturing would only be possible in carefully selected sites.


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URL  <Go to ISI>://000251877400003
DOI  Doi 10.1029/2007gl031560